Potential: If a Cu2+ ion that is initially at rest accelerates through a potential difference of 12 V without friction, how much kinetic energy will it gain? (e = 1.60 × 10-19 C)
A. 3.0 eV.
B. 6.0 eV.
C. 12 eV.
D. 24 eV.
Answer: D
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